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TF FW190 GIANT ARF

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TF FW190 GIANT ARF

Old 07-07-2015, 11:42 AM
  #3926  
Ramstein44
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Hss anyone considered using Shindinmachine.com retracts? He makes a 1/5th scale set that may work with mods of course. Sure they're better then Robarts.
Old 07-08-2015, 05:09 AM
  #3927  
Hot Rod Todd
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I finally was able to get a few flights on my glassed FW190 A-9 conversion . You may recognize it as the plane early in this thread built by Ramstein44. It went through a few hands before I acquired it. Despite a weight of around 32 lbs, it flies well. The Sierra gear are strong enough to handle the extra weight (and actually contribute to a lot of it).

As I mentioned earlier, there are some issues with putting Sierra gear in the Top Flite. The dihedral on the Top Flite is not scale, and the Sierra gear is built to match up to the scale dihedral on the SisT 190. This means they lean in even further than stock. This causes the axles to not be parallel with the ground and adds even more stress than normal. The toe-out is not easily changed, I had to re-drill some split pin holes to adjust it. With the added angle of the gear the toe-out becomes even more crucial to prevent the gear from tucking under. I also had to add bearings to the wheels due to the added stress caused by the angle.

I put a DLE-55RA in it pulling a Xoar 22x8 prop. I like the 22x10 on my lighter 190, but with the extra weight I thought this one could use some extra thrust. It pulls the 190 around nicely at a good scale pace. Wide open it moves out OK, but still much slower than my 25lb 190 with the 10 pitch. Takeoffs and landings have been no problem, although I think I'll stay away from cross wind days. Even though the gear is very strong, there is only so much it can handle. A harsh ground loop would likely rip it out of the wing. I hoped to have more in-flight photos, but my photographer had some issues and lost the images.
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Old 07-08-2015, 05:40 AM
  #3928  
Tony Gag Jr.
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I spoke to Bruce at Century Jet and he is going to try and make a drop in gear that won't require a mod. If he does then I will get his gear. I am going to assume they are a better option than the Robarts.
Old 07-08-2015, 06:18 AM
  #3929  
Hot Rod Todd
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Some of the issues are due to the design. It won't be easy to get drop in gear that's much better. There's really no way to design a gear that has the lock-out braces and works with the offset design. I would recommend to century Jet to cheat a bit and have the gear rotate out further than the scale angle. Not vertical, but far enough to help out with the tuck-under issue caused by the angle. Darryl as Sierra says he will never make a drop-in replacement. It wouldn't hold due to design limitations.
Old 07-08-2015, 06:29 AM
  #3930  
Ramstein44
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Congrats Hot Rod Todd on the flight. She looks good in the air. Originally due to the weight, she was flown with the wheels designed for the SIST which are better then the Williams brothers I set her free with and because of the instant wear due to weight. Strangely, my 1/4 scale Meister D13 weighs less then your TF. These ARF's are just hogs when glassed which was one of the reasons I let her go.
Old 07-08-2015, 06:44 AM
  #3931  
Hot Rod Todd
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I'm sure the glass contributed to the weight. It's a nose weight challenged plane even when the tail is light. The heavy duty Sierra tail wheel retract is also quite heavy, and requires a bunch of nose weight to compensate. The smaller 1/5 Sierra tail wheel is lighter, but because of the small 4-40 shaft size it will bend if there is a side load applied to it.

Surprisingly it flies fine at that weight, but that's usually the case when you do everything perfect. It will be very unforgiving if I make a mistake. It makes it even worse that I'm used to the lighter 190. I have to keep in mind that Tank's Tank (as I call it) will not be happy if I slow it down too much on landing. It sure looks sweet on the ground. Hopefully it will last a while.
Old 07-08-2015, 07:09 AM
  #3932  
Ramstein44
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Yeah, my D13 was very light until I glassed it. Still pretty light at 30lbs. My Meister Fw190A was the same (yet to be weighed).

Glassing IMO is over rated unless you want rivets. You sacrifice weight for scale which the TF model lacks.

Should handle the wind better being heavier.

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Last edited by Ramstein44; 07-08-2015 at 07:38 AM.
Old 07-08-2015, 08:21 AM
  #3933  
Tony Gag Jr.
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Good point about the angle of the gear. I will mention that to Bruce and see what the thinks. Thank you!
Old 07-12-2015, 08:05 AM
  #3934  
BobH
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Just returned from Warbirds over Delaware. My bud picked up a TF 190 and fitted it with Sierra gear... NO PROBLEMS! The gear really looks fine and he said the install was pretty simple.
It performed extremely well with No issues what so ever.
Just wanted to give ya'll that report
Old 07-18-2015, 10:43 AM
  #3935  
Reverend
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Right, on the tenth flight I managed to bend my pin too. That is so darn... $&%@)!!

What a great looking bird and I am having so much fun flying it but this gear is ridiculous.

You can see it bend at 2:10 and honestly, thats a bump it should be able to take.

https://www.youtube.com/watch?v=S5g-VKahloE

Last edited by Reverend; 07-19-2015 at 12:49 AM.
Old 07-18-2015, 11:06 AM
  #3936  
Lifer
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I have a T.F. Giant scale P-40 and P-47 and both have had bounces worse than that and no problems have surfaced. Send your video to Robart, it may help.
Old 07-23-2015, 01:00 PM
  #3937  
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Originally Posted by Reverend
Right, on the tenth flight I managed to bend my pin too. That is so darn... $&%@)!!

What a great looking bird and I am having so much fun flying it but this gear is ridiculous.

You can see it bend at 2:10 and honestly, thats a bump it should be able to take.

https://www.youtube.com/watch?v=S5g-VKahloE
Looking at that NOW I'm worried. Almost afraid to maiden before my clubs Warbird Flyin. Have a question for you. Can you tell me how far from the ring you cut your exhaust? And how far it sticks out of the cowl. My ring is on the way and I would like to trim it before I mount it to the engine.
Old 07-23-2015, 01:23 PM
  #3938  
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V2 Rider,

The Plane has many flights on it without issue. This was the first rough landing though. I did recieve an email from robart today telling me they are working hard on resolving the problem with these pins and that they will get back to me in about a week. In the meantime I am planning on drilling out the soft pins and welding in some 1/4 Inch drillshafts. they should be hard enough.

I cut the Keleo at 33mm, measured on the side. It stands out about 3,5mm. But please check with your plane, I changed the mounting of my cowl conciderably so there may be some tolerance in there...

rgds,
Philipp
Old 07-23-2015, 02:29 PM
  #3939  
V2rider
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Thanks Reverend. I had to make a few changes to mine as well. This gives me an idea of how much to cut off the ring though. Don't want it hanging to far out just incase of gear failure. Hate to have it catch and start ripping other things apart.
Old 07-24-2015, 06:41 AM
  #3940  
SWORDSN
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Originally Posted by Reverend
V2 Rider,

The Plane has many flights on it without issue. This was the first rough landing though. I did recieve an email from robart today telling me they are working hard on resolving the problem with these pins and that they will get back to me in about a week. In the meantime I am planning on drilling out the soft pins and welding in some 1/4 Inch drillshafts. they should be hard enough.

I cut the Keleo at 33mm, measured on the side. It stands out about 3,5mm. But please check with your plane, I changed the mounting of my cowl conciderably so there may be some tolerance in there...

rgds,
Philipp
Do you have air or electric retracts?
Old 07-24-2015, 07:24 AM
  #3941  
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I have the air but the part that fails is identical in both.
Old 07-24-2015, 09:42 AM
  #3942  
vertical grimmace
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Sounds like the Sierra's may be a bargain considering they work. Especially compared to the electrics.
Old 07-24-2015, 05:24 PM
  #3943  
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Originally Posted by Reverend
V2 Rider,

The Plane has many flights on it without issue. This was the first rough landing though. I did recieve an email from robart today telling me they are working hard on resolving the problem with these pins and that they will get back to me in about a week. In the meantime I am planning on drilling out the soft pins and welding in some 1/4 Inch drillshafts. they should be hard enough.

I cut the Keleo at 33mm, measured on the side. It stands out about 3,5mm. But please check with your plane, I changed the mounting of my cowl conciderably so there may be some tolerance in there...

rgds,
Philipp
i wonder if they're going to send everybody "new and improved pins"? Some of us have blown $80 or more on new pins only to have them bend easier than the originals
Old 07-24-2015, 10:25 PM
  #3944  
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Originally Posted by patrnflyr
i wonder if they're going to send everybody "new and improved pins"? Some of us have blown $80 or more on new pins only to have them bend easier than the originals
Granted a bit late, I think its great they are adressing the matter now. As soon as I get contacted I will let you guys know.

Rev
Old 07-25-2015, 04:07 PM
  #3945  
MartinC86bdn
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Robart, send you an updated pin, not going to happen. You will have to pay, or make your own!
Old 07-25-2015, 04:55 PM
  #3946  
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Grind out the pins using a dremel on the weld-seam, put in a steel bolt instead. Just glue it in with epoxy.

If you want it out again, just heat up the unit, and it will fall out.
Old 07-26-2015, 02:03 AM
  #3947  
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Originally Posted by kwik
Grind out the pins using a dremel on the weld-seam, put in a steel bolt instead. Just glue it in with epoxy.

If you want it out again, just heat up the unit, and it will fall out.
Best advice I've seen on this subject yet. A good grade 8 bolt won't bend so easily.
Old 07-26-2015, 03:47 PM
  #3948  
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Default Electric or Air?

I bought a set of Robart electric FW 190 retracts that were advertised as like new. Turns out one motor doesn't work. So I'm going to have to repair the gear and and am debating whether to replace the bad motor ($70) or buy two air cylinders ($65) and do away with the electrics entirely.

I have had problems with Robart electric gear in the past and don't really have a ton of confidence in them. What would you do?
Old 07-27-2015, 12:25 AM
  #3949  
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Originally Posted by SrTelemaster150
Best advice I've seen on this subject yet. A good grade 8 bolt won't bend so easily.
glueing it in is not an option imho. the reoccuring lateral forces willl eventually break the joint and the pin will fall out. welding is the only option I see.
Old 07-27-2015, 12:30 AM
  #3950  
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Originally Posted by radfordc
I bought a set of Robart electric FW 190 retracts that were advertised as like new. Turns out one motor doesn't work. So I'm going to have to repair the gear and and am debating whether to replace the bad motor ($70) or buy two air cylinders ($65) and do away with the electrics entirely.

I have had problems with Robart electric gear in the past and don't really have a ton of confidence in them. What would you do?
I am very happy with the way the air system is performing. Apart from the soft pin problem the retracts are good. Mine holds air for over three weeks. Change the pins, put in the pneumatics ad your have a decent set of retracts.

I have the hardened 6,3mm Drillshafts welded in Place now.

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